Investigating the properly fired enameled steel by the metallurgical microscope, K. Kautz (J. Amer. Ceram. Soc., 1936, 19, 93.) found the gray crystals at the iron-enamel interface. However, mineral structure of these crystals has not been studied. In the thin section for the mineralogical microscope the above crystals which distribute on the irregular surface of corroded iron will not be able to observe. The projecting part of the irregular iron surface will disturb the observation.
By accelerating the speed of crystal growth under a certain condition, the auther ohtained the lrrge crystal whose size is about 100 Times of those found in commercial enameled steel. In contrarily to the former opinions, it became clear that the above mentioned crystals are transparent, yellowish brown iron silicates. The auther studied the structure and the condition of crystallisation of this silicate. The effect of the presence of this crystal on the strength of the adherence between the enamel layer and iron base was discussed.
抄録全体を表示